Re: (ITS#4704) accesslog database fails to store contextCSN at shutdown

[quanah@stanford.edu]

--On Sunday, October 08, 2006 11:36 AM +0000 openldap-its@OpenLDAP.org 
wrote:

I did some testing, and found that the problem is that accesslog is 
creating a new contextCSN every time slapd is started.  Here's my testing:

(a) Search accesslog for its contextCSN:

ldap-test0:/tmp# cat contextCSN.before
dn: cn=accesslog
contextCSN: 20061009111121Z#000000#00#000000


(b) Stop slapd, dump the accesslog DB to LDIF, look at the entry values:

ldap-test0:/tmp# cat contextCSN.LDIF
dn: cn=accesslog
objectClass: auditContainer
cn: accesslog
entryCSN: 20060829205636Z#000000#00#000000
structuralObjectClass: auditContainer
contextCSN: 20061009111121Z#000000#00#000000


(c) Start slapd, query accesslog for its contextCSN:

ldap-test0:/tmp# cat contextCSN.startup
dn: cn=accesslog
contextCSN: 20061009183449Z#000000#00#000000


As you can see, a new version was generated at startup, rather than it 
keeping the one it had at shutdown.  Why, I don't know.



Then, I did the following:

(a) stop slapd
(b) remove the current accesslog db (since all slaves are in sync)
(c) get the contextCSN:

dn: cn=accesslog
contextCSN: 20061009183830Z#000000#00#000000

(d) stopped slapd

(e) started slapd

(f) queried, the contextCSN is the same(?!!)

ldap-test0:~> ldapsearch -LLL -Q -h localhost -b cn=accesslog -s base 
contextCSN
dn: cn=accesslog
contextCSN: 20061009183830Z#000000#00#000000

(g) Made a modification

(h) got the current contectCSN:

dn: cn=accesslog
contextCSN: 20061009184042Z#000000#00#000000


(i) Stopped slapd

(j) restarted slapd

(k) got the contectCSN:

dn: cn=accesslog
contextCSN: 20061009184042Z#000000#00#000000


It is the same again.  So at best guess, something "corrupted" the 
accesslog DB somehow?  I'm not really sure.  I will monitor to see if I get 
back into the same situation again.

--Quanah

--
Quanah Gibson-Mount
Principal Software Developer
ITS/Shared Application Services
Stanford University
GnuPG Public Key: http://www.stanford.edu/~quanah/pgp.html